/* ------------------------------
   Cabeçalho (ajustado)
------------------------------ */
header {
  text-align: center;
  background: linear-gradient(135deg, #35810d, #164832);
  color: #fff;
  padding: 15px 20px; /* era 40px — reduzido */
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  margin-bottom: 30px;
}